Which is more important, the written test or the interview? What's the ratio?

In the campus recruitment examination of China Southern Power Grid, written examination and interview account for a large proportion, and China Southern Power Grid pays more attention to interview results, with written examination (30%)+ interview (70%) (all provinces except Guangdong are the first in the interview). China Southern Power Grid has a wide examination range, which is simpler than the State Grid, with less competition and more choices.